SB20260625162 - Use-after-free in Linux kernel smb server

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-53010)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to use-after-free in smb2_open during durable reconnect handling when processing a durable reconnect request. A remote user can trigger an error condition during durable reconnect to cause a denial of service.

The issue can occur if a subsequent error happens after the durable file descriptor reference is dropped early, or if a scavenger accesses the file before smb2_open returns.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1baff47b81f94f9231c91236aa511420d0e266b9
• https://git.kernel.org/stable/c/97a0cd55283b4e63fd92804da91c8d9896adcad9
• https://git.kernel.org/stable/c/ce2e164c1c51c3f7813b80f8c926836e896bcbb3